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Re:BrachioGraph – a cheap, simple pen plotter by romwell on Friday October 18, 2019 @01:09AM (#21288853)
FWIW, every 3D printer is also a pen plotter (just stick a pen to your print head!).

Here's my old faithful Printrbot plotting a dragon curve:

Fountain pen, timelapse: https://www.instagram.com/p/BlQHk43gwra/

Fountain pen, final image: https://www.instagram.com/p/BlJHawZgFi1/

Ballpoint, realtime: https://www.instagram.com/p/BlJ8dgmAaTA/

Re:BrachioGraph – a cheap, simple pen plotter by aallen90 on Friday October 18, 2019 @01:41AM (#21288972)
That's awesome! What print speed did you use? (your steppers sounded like it was very high) And do you slice 1st layer normally?
Re:BrachioGraph – a cheap, simple pen plotter by romwell on Friday October 18, 2019 @05:00AM (#21289759)
Thanks! I didn't use a slicer, went straight into G-code for that one (wrote a program that generates the G-code for the dragon curve: a sequence of G0 commands).

Don't remember what the feedrate was; with the pen attached tight, I could go pretty fast.